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S. C. JOHNSTON.

SHUTTLE, hPPuculou FILED FEB. 19.1920.

11,366,807. Pat ented Jan. 25, 1921.

UNITED STATES PATENT OFFICE.

SAMUEL CLAUDE JOHNSTON, OF LANCASTER, SOUTH CAROLINA, ASSI To DRAPER CORPORATION, OF HOPEDALE, MASSACHUSETTS, A CORPOR OF MAINE.

SHUTTLE.

Specification of LettersPatent.

Patented Jan. 25, 1921.

Application filed February 19, 1920. Serial No. 359,883.

the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to loom shuttles and more particularly to loom shuttles of fillin replenishing looms wherein, at interva s, the filling carrier or bobbin 1n the shuttle is discharged and another filling carrier or bobbin with a fresh supply of filling is substituted therefor. V

The change of the filling carriers or bobbins in the shuttle is efiected by a transferrer when the shuttle is in the box at the filling replenishing side of the loom. The shuttle is usually provided with bobbin holding jaws which engage rings on the base or head of the bobbin, and to successfully effect the transfer the shuttle and filling carrier or bobbin to be transferred thereto must be properly related at the moment of transfer, otherwise the attempted substitution of the full for the empty bobbin may result 111 breakage of some of the parts, or the substantially denuded bobbin may be only partially discharged, orthe full bobbin may not enter fully into control of the bobbin holding jaws. In any case, in ury to the warps may follow the next pick or the shuttle or some of the parts may be in ured during transfer.

It may happen at times that the shuttle and full bobbin may not be properly related longitudinally at the moment of trans- Irrespective ofthe cause, however, if the replenishing mechanism operates at such times, some or all of the 'ob ectlons hereinbefore mentioned may result.

Attempts have heretofore been made to remedy this defective action either by preventing the operation of the transferrer at such times or by moving the shuttle longitudmally into correct position in the shuttle box. In all of these cases, however, mechanism has been added to the already complicated loom structure. An important object of the present invention, therefore, is to provide simple and effective means on the shuttle itself which will act on the incoming bobbin, should it and the shuttle be not properly related at the moment of transfer, to cause relative longitudinal movement of the shuttle and incoming bobbin into proper relative positions.

In carrying the invention into practical effect, the usual threading block, carried at the delivery end of the shuttle, is provided with a concaved bobbin tip engaging recess the surface of which is inclined downwardl and rearwardly so that when the full bobbin overlies the threading block as it moves into the shuttle, it will be centered in the concaved recess and by traveling down the inclined surface cause relative movement of the bobbin and shuttle in a longitudinal direction as the bobbin fully enters into the shuttle.

Inthe drawing:

Figure 1 is a perspective view showing a full bobbin in the act of being transferred to a shuttle containing the present invention;

Fig. 2 is a longitudinal section of the shuttle showing the threading block in side elevation and the tip end of a bobbin which is to be transferred to the shuttle, the bobbin and shuttle being improperly positioned for transfer;

Fig. 3 is a plan view of the threading block detached from the shuttle;

Fig. 4 is a section on the line M, Fig. 3.

The shuttle body A may be formed as usual and be provided with the chamber 1, pref rably open at top and bottom for the passage of a filling carrier or bobbin therethrough. The chamber 1 is formed to accommodate the filling carrier 2 with its load of filling, and satisfactory jaws, as usual in this class of shuttles, are provided for bold ing the filling carrier in its proper position in the shuttle chamber. These features of the shuttle structure are common and wellknown and consequently are not more fully discussed herein.

In filling replenishing looms it is usual to provide the shutttle with a threading block for the purpose of threading the shuttle as it is picked. The threading block may be of any usual character for automatically threading the shuttle, but in the present instance of the invention the threading block 3 is formed with the upwardly extending side portions i and 5 between which extends the thread passage 6. An overhanging guard 7 acts in conjunction with the opposing side walls of the block to prevent accidental unthreading of the shuttle during the weaving operation. The front end portion of the threading block is provided with a beak 8 and an overhanging shield 9, as usual, the construction being such that when the shuttle is picked the filling leading from the bobbin which has been transferred to the shuttle, may be automatically threaded and finally be led through the side delivery eye 10, as usual in this class of devices.

The front or leading end portion of the threading block adjacent the end of the shuttle will hereinafter be designated the front end or portion, and the end of the threading block adjacent the shuttle chamher will be referred to as the rear end or rear portion thereof. These terms are used for thepurposes of description and identification.

The threading block 3 is held in the body of the shuttle by suitable means, such. as the pin or screw 11, and its rear end portion is formed to provide a bobbin tip centering recess which acts in conjunction with the tip end of a bobbin as it is transferred to the shuttle to center the bobbin in the shuttle chamber and also to relatively move the bobbin and shuttle in a longitudinal direction when the bobbin and shuttle are longitudinally misplaced or related by improper positioning of the shuttle in the shuttle box.

In the present instance of the invention, the upwardly extending side portions l and 5 of the threading block at its rear end at each side of the thread passage, are concave, as indicated at 12, and the surface of the concave portion is inclined downwardly and rearwardly toward the bobbin chamber, as indicated by the dotted line 13, Figs. 3 and l. The concavity thus formed in the rear portion ofthe threading block is in general conformation with the tip end portion of a bobbin which is to be transferred to shuttle chamber. The construction is such that should the bobbin which is to be transferred and the shuttle into which it is to be placed, be improperly positioned relatively so that the tip end portion of the bobbin extends beyond the front portion of the bobbin chamber, the tip end of the bobbin will engage the centering recess in the rear of the threading block as the bobbin is transferred to the shuttle, and efl'ect a centering of the bobbin relative to the shuttle chamber. As the bobbin is further inserted into the shuttle chamber to engage the usual holding jaws with the head of the bobbin, the tip end portion of the bobbin will ride down the inclined surface 13 and effect relative longitudinal movement of the bobbin and shuttle to properly relate the two for effecting the transfer.

The bobbin 14: having the filling i5 wound thereon, as indicated in Fig. 1, is transferred from the magazine to the shuttle by means of a transferrer as usual, part of said transferrer being indicated at 16, Fig. 1. The tip end portion 17 of the bobbin is formed as usual, preferably somewhat rounded and the concave centering recess formed in the rear portion of the threading block is shaped to accommodate the tip end of the bobbin as it is moved downwardly from the dotted line position, Fig. 2, to its full line position. During this movement the tip end portion 17 engages the concave entering recess in the rear of the threading block and between the upwardly extending side portions thereof, and rides down while bearing upon the inclined surface 13 which may preferably be somewhat curved, as indicated by dotted lines in Fig. 2, the eifect being that should the tip end 17 of the bobbin overlie the rear end portion of the threading block when the bobbin is to be transferred to the shuttle, as indicated in dotted lines, Fig. 2, the centering recess and its inclined surface leading downwardly and rearwardly toward the shuttle chamber, will effect a proper center ing of the bobbin within the shuttle chamber and relative longitudinal movement of the bobbin and shuttle to bring the usual bobbin holding jaws into coiiperating relation with the usual rings on the head or base of the bobbin.

From the construction described it will be clear that without encumbering the loom construction with additional mechanism for effecting relative longitudinal movement of the shuttle and bobbin at the moment of transfer when they are improperly related, the present invention provides a simple and effective means in the shuttle itself which does not necessitate addition either to the loom structure or to the shuttle to effectively insure proper longitudinal relation of the bobbin and shuttle at the moment of trans 61.

The threading block herein indicated is of the usual Draper type now well lrnown in the art, and is selected here for illustrating the present invention in connection therewith, but it is to be understood that the invention might be embodied in other forms of threading blocks.

A self-threading loom shuttle for filling replenishing looms provided with a metallic threading block havingalongitudinal thread and shuttle longitudinally as the bobbin is guide or passage,the upper end portion of the transferred to the shuttle, the lower rear end threading block adjacent the bobbin chamber portion of the threading block being directed being inclined downwardly from the top of downwardly at an angle to the upper por- 5 the threading block toward the bobbin tion to permit the free passage of the bob- 15' chamber and concaved to form a bobbin tip bin.

receiving recess to engage the tip of a bobbin In testimony whereof, I have signed my as it is transferred to the shuttle when the name to this specification. tip of a bobbin overlies the threading block,

10 and cause relative movement of the bobbin SAMUEL CLAUDE JOHNSTON. 

